Chrysler PT Cruiser Service & Repair Manual page 322

8E - 8 ELECTRONIC CONTROL MODULES
POWERTRAIN CONTROL MODULE (Continued)
Fig. 8 Example of CVI Calculation
1 - OUTPUT SPEED SENSOR
2 - OUTPUT SHAFT
3 - CLUTCH PACK
4 - SEPARATOR PLATE
5 - FRICTION DISCS
6 - INPUT SHAFT
7 - INPUT SPEED SENSOR
8 - PISTON AND SEAL
Clutch
L/R
2/4
OD
UD
CLUTCH VOLUMES
Shift Sequence Oil Temperature
2-1 or 3-1 coast
downshift
1-2 shift
2-3 shift
4-3 or 4-2 shift
Certain mechanical problems within the clutch
assemblies (broken return springs, out of position
snap rings, excessive clutch pack clearance, improper
assembly, etc.) can cause inadequate or out-of-range
clutch volumes. Also, defective Input/Output Speed
Sensors and wiring can cause these conditions. The
following chart identifies the appropriate clutch vol-
umes and when they are monitored/updated:
When Updated
> 70°
> 110°
Throttle Angle
< 5°
5 - 54°
> 5°
PT
Proper Clutch
Volume
35 to 83
20 to 77
48 to 150
24 to 70